Do you have any _____ friends at school? [ ]
A. close
B. closed
C. closing
D. closes
答案:A
微型计算机中,普遍使用的字符编码是
A.补码
B.原码
C.ASCII码
D.汉字编码
3~6个月小儿应接种
A.麻疹疫苗B.乙型脑炎疫苗C.脊髓灰质炎疫苗D.百、白、破混合制剂E.乙肝疫苗